inet_ntop(AF_INET6, &e[i].router, &buf[buf_len], INET6_ADDRSTRLEN);
buf_len += strlen(&buf[buf_len]);
buf_len += snprintf(&buf[buf_len], 24, "/%u", e[i].priority);
inet_ntop(AF_INET6, &e[i].router, &buf[buf_len], INET6_ADDRSTRLEN);
buf_len += strlen(&buf[buf_len]);
buf_len += snprintf(&buf[buf_len], 24, "/%u", e[i].priority);